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Distribution of Soil Zinc, Iron, Copper and Manganese Fractions and Its Relationship with Plant Availability

作者：

ZOU BANG-JI;MO RUN-CANG

单位：

;Institute of Applied Ecology, Academia Sinica, Shenyang 110015 (China)

关键词：

availability;distribution;soils;zn;fe;cu and mn fractions

摘要：

The distribution of various fractions of Zn, Fe, Cu and Mn in 15 types of soils in China and its relationship with plant availability were studied. Fractions of various elements were found to have some similar characteristic distribution regularitiesin various types of soils, but various soil types differed to varying degrees in the distribution of each fraction. Soil physico-chemical properties, such as pH, CEC and the contents of OM, CaCO_3, free Fe, free Mn and P_2O_5, were significantly correlated with the distribution of elemental fractions, and a significant correlation also existed between the distribution and plant availability of elemental fractions. Various fractions of each element were divided into two groups based on their plant availability. The correlation between the distribution of combination fractions and plant availability indicated a significantly or an extremely significantly positive correlation for Group I but a significantly or an extremely significantly negative correlation for Group II. Therefore, the fractions in Group I were primary pools of available nutrients, while those in Group II could hardly provide available nutrients for plants. Decreasing the transformation of corresponding elements into fractions of Group II and increasing the storage capacity of various fractions of Group I were an important direction for regulation and controlling of soil nutrients. However, some Particular soils with too high contents of Zn, Fe, Cu and Mn should be regulated and controlled adversely.

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Distribution of Soil Zinc, Iron, Copper and Manganese Fractions and Its Relationship with Plant Availability

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